YN35mm F2S DF DSM is a small, lightweight and universal F/2 large aperture full frame lens suitable for landscape, night scenes, street photography, food and other photography subjects. Fn button With the Fn custom function button, the function menu or shortcut operation can be quickly used to improve the efficiency of creation. Small and Light The maximum diameter and length of the lens is about 67*72mm, and the net weight is only about 295g. The lightweight design is portable for daily use and long-term handheld shooting and video recording. Built-in Silent CNC Stepper Motor Compared with traditional DC motors, digital stepper motors (DSM) have fast start-stop response, high focusing accuracy and quieter focusing actions, which are suitable for photo taking and video recording. F/2 large aperture With a large F/2 aperture, it's easy to achieve a soft blur effect. You can also use low sensitivity and higher shutter to shoot in low light environment. 9 optical lenses in 8 groups with nano-multi-layer coating The structure which is composed of 9 elements/8 groups with nano-multi-layer coating effectively improves light transmission and suppresses ghosting and backlit reflections. Aspherical lens*1 Various aberrations can be compensated by a built-in aspherical lens. Low Dispersion Lens*1 Equipped with low dispersion glass lens, which can effectively suppress the dispersion problem caused by wide angle. 7 Circular Aperture Blades The lens is designed with 7 circular aperture blades. It can film diffuse circular dots. It can also take pictures with 14 star effects if the aperture is properly reduced. USB Firmware Upgrade With a USB Type-C interface on the lens, you can download the latest firmware for upgrade to keep the lens at its best performance. Metal Bayonet and Contacts The use of high-precision metal bayonet and gold-plated contacts effectively improves signal conductivity and corrosion resistance. At the same time, it enables the camera and lens to maintain reliable communication, and realizes functions such as autofocus, aperture control, and EXIF information transmission.